Stephen discusses how HVAC technicians are using mobile devices to perform residential HVAC load calculations. So much processing power is now packed into mobile devices that complex software such as this that once could only run on desktop computers can easily run on these mobile devices. HVAC technicians have quickly embraced these devices to perform all manner of field-based work. Some of the benefits include: Saving time by entering all information onsite and emailing required reports to code officials and clients and calculating more accurate HVAC cooling and heating loads so that equipment is sized correctly.